photocell
/ˈfəʊtəʊsɛl
/noun
Short for photoelectric cell.The receiver uses a photocell or photodiode to detect the light....
- The light passing through each filter is detected by the photocell, where it is converted to an electrical pulse.
- In the presence of a magnetic field, the amount of laser light that is absorbed by the atoms changes and this is detected by a photocell.